V interfaces at the digital Local Exchange (LE); V5.1 interface for the support of Access Network (AN); Part 9: Test specification for the physical layer
数字本地交换机(LE)的V接口;V5 1个支持接入网(AN)的接口;第9部分:物理层试验规范
Abstract Test Suite specification (ATS in TTCN) and protocol implementation extra information for testing (PIXIT) proforma V5.1 interface for support of Access Network; 2 048 kBit/s interface without concentration capability within the Access Network